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Let f(theta) = sqrt(a^2cos^2theta+b^2sin...

Let `f(theta) = sqrt(a^2cos^2theta+b^2sin^2theta) + sqrt(a^2sin^2theta+b^2cos^2theta)`
Minimum value of `[f(theta)]^2`

A

`(a+b)^2`

B

`(a-b)^2`

C

`2(a^2+b^2)`

D

`2sqrt(a^2+b^2)

Text Solution

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The correct Answer is:
C
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